<?php

class Application_Model_GuestbookMapper
{
	protected $_dbTable;
   
	public function setDbTable($dbTable)
	{
		if (is_string($dbTable)) {
			$dbTable = new $dbTable();
		}
		if (!$dbTable instanceof Zend_Db_Table_Abstract) {
			throw new Exception('Invalid table data gateway provided');
		}
		$this->_dbTable = $dbTable;
		return $this;
	}
   
	public function getDbTable()
	{
		if (null === $this->_dbTable) {
			$this->setDbTable('Application_Model_DbTable_Guestbook');
		}
		return $this->_dbTable;
	}
   
	public function save(Application_Model_Guestbook $guestbook)
	{
		$data = array(
			'email'   => $guestbook->getEmail(),
			'comment' => $guestbook->getComment(),
			'created' => date('Y-m-d H:i:s'),
		);
		   
		if (null === ($id = $guestbook->getId())) {
			unset($data['id']);
			$this->getDbTable()->insert($data);
		} else {
			$this->getDbTable()->update($data, array('id = ?' => $id));
		}
	}
   
	public function find($id, Application_Model_Guestbook $guestbook)
	{
		$result = $this->getDbTable()->find($id);
		if (0 == count($result)) {
			return;
		}
		$row = $result->current();
		$guestbook->setId($row->id)
				  ->setEmail($row->email)
				  ->setComment($row->comment)
				  ->setCreated($row->created);
	}
   
	public function fetchAll()
	{
		$resultSet = $this->getDbTable()->fetchAll();
		$entries   = array();
		foreach ($resultSet as $row) {
			$entry = new Application_Model_Guestbook();
			$entry->setId($row->id)
				  ->setEmail($row->email)
				  ->setComment($row->comment)
				  ->setCreated($row->created);
			$entries[] = $entry;
		}
		return $entries;
	}
}

